Because for the majority of them, that would entail having to acknowledge comics older than most of them have been alive, or worse, Avengers comics!
It’s a part of the tradition of fridging: the victim must not only be harmed to motivate the hero, but look beautiful and alluring while doing so (since the part is also a nonverbal on). The usual violence and sexual allure interplay is more jarring than usual because of Wanda and Magneto’s father-daughter relationship (blood or not).
About her running: I saw someone saying that she probably did so because of how it would look for her to be found fighting a mutant at Krakoa.
And maybe it's really a kid who heard the Pretender stories and she doesn't want to hurt them. (it's Leah Williams though so yeah it could also just be as dumb as it looks).
The thing is that she can't be depowered by that unless that is to depower magic users, Wanda's mutant power ins't what made her powerful, was her magical training and control over Chaos Magic, she's a natural Witch since her mother was one
She Hulk Vol 1 #3
Basically a guy is killed and his ghost is summoned at the trial, where he says that instead of the accused it is his girlfriend (who dumped him) that killed him. However Jen later discovers that he lied, so his girlfriend would get the death penalty and they would be reunited in the afterlife.
https://marvel.fandom.com/wiki/She-Hulk_Vol_1_3
I doubt that. It's just more of the usual of how comics treats Wanda. Any progression she's had doesn't matter. If it were MCU synergy, she'd have never met Mags and would be in her costume from the MCU.
She's instead the beautiful corpse trope for an x-story focused on Magneto.
Love is for souls, not bodies.